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6/26/2009 8:03PM

Howard Buffett's Crusade Against African Famine

As the global economic downturn sets back decades of work to end world hunger, Warren Buffett's son, Howard Buffett, takes on a surprising, little-known role on the front lines. Mr. Buffett travels from Ghana to Togo to Benin, trying to spread approaches to farming that he's found successful on his Illinois farm. Scott Kilman and Roger Thurow report.